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#include "pathgridutil.hpp"
#include <osg/Geometry>
#include <osg/Material>
#include <components/esm3/loadpgrd.hpp>
#include <limits>
namespace SceneUtil
{
namespace
{
constexpr unsigned short DiamondVertexCount = 6;
constexpr unsigned short DiamondIndexCount = 24;
constexpr unsigned short DiamondWireframeIndexCount = 24;
constexpr unsigned short DiamondConnectorVertexCount = 4;
constexpr unsigned short DiamondTotalVertexCount = DiamondVertexCount + DiamondConnectorVertexCount;
constexpr float DiamondWireframeScalar = 1.1f;
const osg::Vec3f DiamondPoints[DiamondVertexCount] = { osg::Vec3f(0.f, 0.f, DiamondHalfHeight * 2.f),
osg::Vec3f(-DiamondHalfWidth, -DiamondHalfWidth, DiamondHalfHeight),
osg::Vec3f(-DiamondHalfWidth, DiamondHalfWidth, DiamondHalfHeight),
osg::Vec3f(DiamondHalfWidth, -DiamondHalfWidth, DiamondHalfHeight),
osg::Vec3f(DiamondHalfWidth, DiamondHalfWidth, DiamondHalfHeight), osg::Vec3f(0.f, 0.f, 0.f) };
constexpr unsigned short DiamondIndices[DiamondIndexCount]
= { 0, 2, 1, 0, 1, 3, 0, 3, 4, 0, 4, 2, 5, 1, 2, 5, 3, 1, 5, 4, 3, 5, 2, 4 };
constexpr unsigned short DiamondWireframeIndices[DiamondWireframeIndexCount]
= { 0, 1, 0, 2, 0, 3, 0, 4, 1, 2, 2, 4, 4, 3, 3, 1, 5, 1, 5, 2, 5, 3, 5, 4 };
constexpr unsigned short DiamondConnectorVertices[DiamondConnectorVertexCount] = { 1, 2, 3, 4 };
const osg::Vec4f DiamondColors[DiamondVertexCount]
= { osg::Vec4f(0.f, 0.f, 1.f, 1.f), osg::Vec4f(0.f, .05f, .95f, 1.f), osg::Vec4f(0.f, .1f, .95f, 1.f),
osg::Vec4f(0.f, .15f, .95f, 1.f), osg::Vec4f(0.f, .2f, .95f, 1.f), osg::Vec4f(0.f, .25f, 9.f, 1.f) };
const osg::Vec4f DiamondEdgeColor = osg::Vec4f(0.5f, 1.f, 1.f, 1.f);
const osg::Vec4f DiamondWireColor = osg::Vec4f(0.72f, 0.f, 0.96f, 1.f);
const osg::Vec4f DiamondFocusWireColor = osg::Vec4f(0.91f, 0.66f, 1.f, 1.f);
template <class PType, class LType>
void addPathgridToGeometry(const size_t vertexCount, const size_t pointIndexCount, const size_t edgeIndexCount,
osg::ref_ptr<osg::Geometry>& gridGeometry, const ESM::Pathgrid& pathgrid)
{
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array(vertexCount);
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array(vertexCount);
osg::ref_ptr<PType> pointIndices = new PType(osg::PrimitiveSet::TRIANGLES, pointIndexCount);
osg::ref_ptr<LType> lineIndices = new LType(osg::PrimitiveSet::LINES, edgeIndexCount);
// Add each point/node
for (size_t pointIndex = 0; pointIndex < pathgrid.mPoints.size(); ++pointIndex)
{
const ESM::Pathgrid::Point& point = pathgrid.mPoints[pointIndex];
osg::Vec3f position = osg::Vec3f(point.mX, point.mY, point.mZ);
size_t vertexOffset = pointIndex * DiamondTotalVertexCount;
size_t indexOffset = pointIndex * DiamondIndexCount;
// Point
for (unsigned short i = 0; i < DiamondVertexCount; ++i)
{
(*vertices)[vertexOffset + i] = position + DiamondPoints[i];
(*colors)[vertexOffset + i] = DiamondColors[i];
}
for (unsigned short i = 0; i < DiamondIndexCount; ++i)
{
pointIndices->setElement(indexOffset + i, vertexOffset + DiamondIndices[i]);
}
// Connectors
vertexOffset += DiamondVertexCount;
for (unsigned short i = 0; i < DiamondConnectorVertexCount; ++i)
{
(*vertices)[vertexOffset + i] = position + DiamondPoints[DiamondConnectorVertices[i]];
(*colors)[vertexOffset + i] = DiamondEdgeColor;
}
}
// Add edges
unsigned int lineIndex = 0;
for (const ESM::Pathgrid::Edge& edge : pathgrid.mEdges)
{
if (edge.mV0 == edge.mV1 || edge.mV0 >= pathgrid.mPoints.size() || edge.mV1 >= pathgrid.mPoints.size())
continue;
const ESM::Pathgrid::Point& from = pathgrid.mPoints[edge.mV0];
const ESM::Pathgrid::Point& to = pathgrid.mPoints[edge.mV1];
osg::Vec3f fromPos = osg::Vec3f(from.mX, from.mY, from.mZ);
osg::Vec3f toPos = osg::Vec3f(to.mX, to.mY, to.mZ);
osg::Vec3f dir = toPos - fromPos;
dir.normalize();
osg::Quat rot(static_cast<float>(-osg::PI_2), osg::Vec3f(0, 0, 1));
dir = rot * dir;
unsigned short diamondIndex = 0;
if (dir.isNaN())
diamondIndex = 0;
else if (dir.y() >= 0 && dir.x() > 0)
diamondIndex = 3;
else if (dir.x() <= 0 && dir.y() > 0)
diamondIndex = 1;
else if (dir.y() <= 0 && dir.x() < 0)
diamondIndex = 0;
else if (dir.x() >= 0 && dir.y() < 0)
diamondIndex = 2;
unsigned fromIndex = static_cast<unsigned>(edge.mV0);
unsigned toIndex = static_cast<unsigned>(edge.mV1);
lineIndices->setElement(
lineIndex++, fromIndex * DiamondTotalVertexCount + DiamondVertexCount + diamondIndex);
lineIndices->setElement(
lineIndex++, toIndex * DiamondTotalVertexCount + DiamondVertexCount + diamondIndex);
}
lineIndices->resize(lineIndex);
gridGeometry->setVertexArray(vertices);
gridGeometry->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
if (!pointIndices->empty())
gridGeometry->addPrimitiveSet(pointIndices);
if (!lineIndices->empty())
gridGeometry->addPrimitiveSet(lineIndices);
gridGeometry->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
}
template <class T>
void addWireFrameGeometry(const size_t vertexCount, const size_t indexCount,
osg::ref_ptr<osg::Geometry>& wireframeGeometry, const ESM::Pathgrid& pathgrid,
const std::vector<unsigned short>& selected)
{
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array(vertexCount);
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array(vertexCount);
osg::ref_ptr<T> indices = new T(osg::PrimitiveSet::LINES, indexCount);
osg::Vec3f wireOffset = osg::Vec3f(0, 0, (1 - DiamondWireframeScalar) * DiamondHalfHeight);
// Add each point/node
for (size_t it = 0; it < selected.size(); ++it)
{
const ESM::Pathgrid::Point& point = pathgrid.mPoints[selected[it]];
osg::Vec3f position = osg::Vec3f(point.mX, point.mY, point.mZ) + wireOffset;
size_t vertexOffset = it * DiamondVertexCount;
size_t indexOffset = it * DiamondWireframeIndexCount;
// Point
for (unsigned short i = 0; i < DiamondVertexCount; ++i)
{
(*vertices)[vertexOffset + i] = position + DiamondPoints[i] * DiamondWireframeScalar;
if (it == selected.size() - 1)
(*colors)[vertexOffset + i] = DiamondFocusWireColor;
else
(*colors)[vertexOffset + i] = DiamondWireColor;
}
for (unsigned short i = 0; i < DiamondWireframeIndexCount; ++i)
{
indices->setElement(indexOffset + i, vertexOffset + DiamondWireframeIndices[i]);
}
}
wireframeGeometry->setVertexArray(vertices);
wireframeGeometry->setColorArray(colors, osg::Array::BIND_PER_VERTEX);
wireframeGeometry->addPrimitiveSet(indices);
wireframeGeometry->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
}
}
osg::ref_ptr<osg::Geometry> createPathgridGeometry(const ESM::Pathgrid& pathgrid)
{
const size_t vertexCount = pathgrid.mPoints.size() * DiamondTotalVertexCount;
const size_t pointIndexCount = pathgrid.mPoints.size() * DiamondIndexCount;
const size_t edgeIndexCount = pathgrid.mEdges.size() * 2;
osg::ref_ptr<osg::Geometry> gridGeometry = new osg::Geometry();
if (pointIndexCount || edgeIndexCount)
{
const bool useIntPoints = pointIndexCount > std::numeric_limits<unsigned short>::max();
const bool useIntVertices = vertexCount > std::numeric_limits<unsigned short>::max();
if (useIntPoints && useIntVertices)
addPathgridToGeometry<osg::DrawElementsUInt, osg::DrawElementsUInt>(
vertexCount, pointIndexCount, edgeIndexCount, gridGeometry, pathgrid);
else if (useIntPoints)
addPathgridToGeometry<osg::DrawElementsUInt, osg::DrawElementsUShort>(
vertexCount, pointIndexCount, edgeIndexCount, gridGeometry, pathgrid);
else if (useIntVertices)
addPathgridToGeometry<osg::DrawElementsUShort, osg::DrawElementsUInt>(
vertexCount, pointIndexCount, edgeIndexCount, gridGeometry, pathgrid);
else
addPathgridToGeometry<osg::DrawElementsUShort, osg::DrawElementsUShort>(
vertexCount, pointIndexCount, edgeIndexCount, gridGeometry, pathgrid);
}
osg::ref_ptr<osg::Material> material = new osg::Material;
material->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
gridGeometry->getOrCreateStateSet()->setAttribute(material);
return gridGeometry;
}
osg::ref_ptr<osg::Geometry> createPathgridSelectedWireframe(
const ESM::Pathgrid& pathgrid, const std::vector<unsigned short>& selected)
{
const size_t vertexCount = selected.size() * DiamondVertexCount;
const size_t indexCount = selected.size() * DiamondWireframeIndexCount;
osg::ref_ptr<osg::Geometry> wireframeGeometry = new osg::Geometry();
if (indexCount)
{
if (vertexCount > std::numeric_limits<unsigned short>::max())
addWireFrameGeometry<osg::DrawElementsUInt>(
vertexCount, indexCount, wireframeGeometry, pathgrid, selected);
else
addWireFrameGeometry<osg::DrawElementsUShort>(
vertexCount, indexCount, wireframeGeometry, pathgrid, selected);
}
return wireframeGeometry;
}
unsigned short getPathgridNode(unsigned vertexIndex)
{
return static_cast<unsigned short>(vertexIndex / (DiamondVertexCount + DiamondConnectorVertexCount));
}
}
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